<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>翻转世界</title>
</head>

<body>
    <div id="app">
        <p>{{msg}} </p>
        <button @click="invert(msg)">逆转世界</button>
    </div>
</body>
<script src="./vue.js"></script>
<script>
    const app = new Vue({
        el: '#app',
        data: {
            msg: 'Hello,World'
        },
        methods: {
            invert(str) {
                this.msg = str.split('').reverse().join('')
            }
        }
    })
</script>

</html>